请问有人能帮我在Flutter上使用audioplayers吗？ 我正在创建一个Flutter的收音机播放器。声音应该从URL中播放。资产和所有设置都正确。但我在Android上无法听到声音，但它在网页浏览器上可以正常工作。Flutter没有报任何错误。所以我不知道哪里出了问题。
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/services.dart';
import 'package:internet_radio_app/model/radio.dart';
import 'package:internet_radio_app/utils/ai_util.dart';
import 'package:velocity_x/velocity_x.dart';
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
List<MyRadio> radios;
MyRadio _selectedRadio;
Color _selectedColor;
bool _isPlaying = false;
final AudioPlayer _audioPlayer = AudioPlayer();
@override
void initState() {
super.initState();
fetchRadios();
_audioPlayer.onPlayerStateChanged.listen((event) {
if (event == PlayerState.PLAYING) {
_isPlaying = true;
} else {
_isPlaying = false;
}
setState(() {});
});
}
fetchRadios() async {
final radioJson = await rootBundle.loadString("assets/radio.json");
radios = MyRadioList.fromJson(radioJson).radios;
print(radios);
setState(() {});
}
_playMusic(String url) {
_audioPlayer.play(url);
_selectedRadio = radios.firstWhere((element) => element.url == url);
print(_selectedRadio.name);
setState(() {});
}
@override
Widget build(BuildContext context) {
return Scaffold(
drawer: Drawer(),
body: Stack(
children: [
VxAnimatedBox()
.size(context.screenWidth, context.screenHeight)
.withGradient(
LinearGradient(
colors: [
AIColors.primaryColor2,
_selectedColor ?? AIColors.primaryColor1,
],
begin: Alignment.topLeft,
end: Alignment.bottomRight,
),
)
.make(),
AppBar(
title: "AI Radio".text.xl4.bold.white.make().shimmer(
primaryColor: Vx.purple300,
secondaryColor: Colors.white,
),
backgroundColor: Colors.transparent,
elevation: 0.0,
centerTitle: true,
).h(100.0).p16(),
radios != null
? VxSwiper.builder(
itemCount: radios.length,
aspectRatio: 1.0,
enlargeCenterPage: true,
onPageChanged: (index) {
final colorHex = radios[index].color;
_selectedColor = Color(int.tryParse(colorHex));
setState(() {});
},
itemBuilder: (context, index) {
final rad = radios[index];
return VxBox(
child: ZStack(
[
Positioned(
top: 0.0,
right: 0.0,
child: VxBox(
child:
rad.category.text.uppercase.white.make().px16(),
)
.height(40)
.black
.alignCenter
.withRounded(value: 10.0)
.make(),
),
Align(
alignment: Alignment.bottomCenter,
child: VStack(
[
rad.name.text.xl3.white.bold.make(),
5.heightBox,
rad.tagline.text.sm.white.semiBold.make(),
],
crossAlignment: CrossAxisAlignment.center,
),
),
Align(
alignment: Alignment.center,
child: [
Icon(
CupertinoIcons.play_circle,
color: Colors.white,
),
10.heightBox,
"Double tap to play".text.gray300.make(),
].vStack()),
],
))
.clip(Clip.antiAlias)
.bgImage(
DecorationImage(
image: NetworkImage(rad.image),
fit: BoxFit.cover,
colorFilter: ColorFilter.mode(
Colors.black.withOpacity(0.3),
BlendMode.darken)),
)
.border(
color: Colors.black,
width: 5.0,
)
.withRounded(value: 60.0)
.make()
.onInkDoubleTap(() {
_playMusic(rad.url);
}).p16();
},
).centered()
: Center(
child: CircularProgressIndicator(
backgroundColor: Colors.white,
),
),
Align(
alignment: Alignment.bottomCenter,
child: [
if (_isPlaying)
"Playing Now -${_selectedRadio.name} FM"
.text
.white
.makeCentered(),
Icon(
_isPlaying
? CupertinoIcons.stop_circle
: CupertinoIcons.play_circle,
color: Colors.white,
size: 50.0,
).onInkTap(() {
if (_isPlaying) {
_audioPlayer.stop();
} else {
_playMusic(_selectedRadio.url);
}
}),
].vStack(),
).pOnly(bottom: context.percentHeight * 12),
],
fit: StackFit.expand,
clipBehavior: Clip.antiAlias,
),
);
}
}